Copper production fell 6.7% in November from the same month a year earlier.

China has been encouraging state-owned enterprises to improve their efficiency by offloading "zombie" companies.

In 2014, Buenavista del Cobre accidentally released close to 40,000 cubic meters of wastewater into the Bacanuchi River in Sonora.

Just a week ago, Mendoza's legislature passed a law that allowed for the use of cyanide and sulfuric acid in mining operations.

The natural endowment of the region continues to drive mineral exploration.

Net proceeds will be used to fund exploration and development activities at the company's flagship AntaKori project.